74
T. A. Aragaw and B. A. Mekonnen
(Neocalanus cristatus and Euphausia pacifia) in the Northeast Pacific Ocean near
British Columbia, Canada. The result proves the MPs encounter rates by ingestion
were estimated to 1 particle/every 34 copepods (or 0.026 ± 0.005 particles/individual
zooplankton) and 1/every 17 euphausiids (or 0.058 ± 0.01 particles/zooplankton).
The confirmation of MPs ingestion thru by marine zooplankton indicated that species
at lower trophic levels of the marine food web are muddle up plastic for food, which
arises potential risks to higher trophic level species. Accordingly, the intake of MP
containing zooplankton can lead to estimated ingestion of 2–7 MPs particles/day by
single juvenile salmon in coastal British Columbia, Canada [26].
MPs were also detected in filter feeder and deposit feeder living organisms along
the French–Belgian–Dutch coastline [27]. The uptake of MPs by marine invertebrates
(blue mussel Mytilus edulis and lugworm Arenicola marina) was studied under field
conditions collected from six locations of the study area at different feeding strategies. Under laboratory investigation, the mussels (filter feeder) and the lugworms
(deposit feeder) were exposed to 110 particles/mL seawater and 110 particles/g sediments of polystyrene microspheres. The laboratory result illustrates the presence of
MPs (<1 mm) in organisms together in the field: on average 0.2 ± 0.3 MPs/g of M.
edulis and 1.2 ± 2.8 particles/g of A. marina. However, the aforementioned concentration of polystyrene microspheres didn’t show an adverse effect on the overall
energy budget of the species. [27]. Similarly, the occurrence of MPs was studied
on species of commercially grown bivalves (Mytilus edulis and Crassostrea gigas).
The investigation confirmed the ingestion of MPs (<1 mm) and recovered from both
species’ soft tissues. The MPs appeared as red particles extracted from M. edulis
tissue resembles that of the pigment haematite. Whereas the blue particles from C.
gigas resemble the widely deployed phthalocyanine dyes. For this reason, the Raman
spectra obtained during the analysis could be originated from the pigments present
in the particles, and not those from the plastic spectrometer. Furthermore, at the
moment of human intake, M. edulis has an average of 0.36 ± 0.07 particles/g (wet
weight of the organism), and C. gigas contains 0.47 ± 0.16 particles/g (wet weight
of the organism). Consequently, the annual dietary exposure for European shellfish
users is about 11,000 MPs per year. Hence, the occurrence of MPs in seafood could
arises a risk to human health [28].
Moreover, MPs (<5 mm) uptake was noted in Galeus melastomus, the blackmouth
catshark, nearby the Balearic Islands. In this regard, MPs abundance for 125 catshark
samples were evaluated, and results shown 17% of the specimens had ingested at
a mean value of 0.34 ± 0.07 MPs/individual. The identity and percentage of MPs
polymers identified were Cellophane (33%), Polyacrylonitrile (4.5%), Polyethylene
(4.5%), Polyethylene terephthalate (PET) (4.5%) Poly Ethyl Acrylate (27%) Polyacrylate (1.5%), Polyamide (PA) (12%), Polypropylene (PP) (3.0%), Alkyd (1.5%).
In addition, higher magnitudes of filament type (86%), fragment (12%), and film
(1.5%) MPs were recognized with black, blue, red, transparent, and white colors in
Galeus melastomus. Furthermore, a percentage range of 0.86–39% stomach fullness
index plus regression analysis indicated that fuller stomachs contained more MPs.
The outcomes in the exploration reproduce the availability, quantity, and composition
of MPs litter ingested by marine species in seafloor habitats [29].
T. A. Aragaw and B. A. Mekonnen
(Neocalanus cristatus and Euphausia pacifia) in the Northeast Pacific Ocean near
British Columbia, Canada. The result proves the MPs encounter rates by ingestion
were estimated to 1 particle/every 34 copepods (or 0.026 ± 0.005 particles/individual
zooplankton) and 1/every 17 euphausiids (or 0.058 ± 0.01 particles/zooplankton).
The confirmation of MPs ingestion thru by marine zooplankton indicated that species
at lower trophic levels of the marine food web are muddle up plastic for food, which
arises potential risks to higher trophic level species. Accordingly, the intake of MP
containing zooplankton can lead to estimated ingestion of 2–7 MPs particles/day by
single juvenile salmon in coastal British Columbia, Canada [26].
MPs were also detected in filter feeder and deposit feeder living organisms along
the French–Belgian–Dutch coastline [27]. The uptake of MPs by marine invertebrates
(blue mussel Mytilus edulis and lugworm Arenicola marina) was studied under field
conditions collected from six locations of the study area at different feeding strategies. Under laboratory investigation, the mussels (filter feeder) and the lugworms
(deposit feeder) were exposed to 110 particles/mL seawater and 110 particles/g sediments of polystyrene microspheres. The laboratory result illustrates the presence of
MPs (<1 mm) in organisms together in the field: on average 0.2 ± 0.3 MPs/g of M.
edulis and 1.2 ± 2.8 particles/g of A. marina. However, the aforementioned concentration of polystyrene microspheres didn’t show an adverse effect on the overall
energy budget of the species. [27]. Similarly, the occurrence of MPs was studied
on species of commercially grown bivalves (Mytilus edulis and Crassostrea gigas).
The investigation confirmed the ingestion of MPs (<1 mm) and recovered from both
species’ soft tissues. The MPs appeared as red particles extracted from M. edulis
tissue resembles that of the pigment haematite. Whereas the blue particles from C.
gigas resemble the widely deployed phthalocyanine dyes. For this reason, the Raman
spectra obtained during the analysis could be originated from the pigments present
in the particles, and not those from the plastic spectrometer. Furthermore, at the
moment of human intake, M. edulis has an average of 0.36 ± 0.07 particles/g (wet
weight of the organism), and C. gigas contains 0.47 ± 0.16 particles/g (wet weight
of the organism). Consequently, the annual dietary exposure for European shellfish
users is about 11,000 MPs per year. Hence, the occurrence of MPs in seafood could
arises a risk to human health [28].
Moreover, MPs (<5 mm) uptake was noted in Galeus melastomus, the blackmouth
catshark, nearby the Balearic Islands. In this regard, MPs abundance for 125 catshark
samples were evaluated, and results shown 17% of the specimens had ingested at
a mean value of 0.34 ± 0.07 MPs/individual. The identity and percentage of MPs
polymers identified were Cellophane (33%), Polyacrylonitrile (4.5%), Polyethylene
(4.5%), Polyethylene terephthalate (PET) (4.5%) Poly Ethyl Acrylate (27%) Polyacrylate (1.5%), Polyamide (PA) (12%), Polypropylene (PP) (3.0%), Alkyd (1.5%).
In addition, higher magnitudes of filament type (86%), fragment (12%), and film
(1.5%) MPs were recognized with black, blue, red, transparent, and white colors in
Galeus melastomus. Furthermore, a percentage range of 0.86–39% stomach fullness
index plus regression analysis indicated that fuller stomachs contained more MPs.
The outcomes in the exploration reproduce the availability, quantity, and composition
of MPs litter ingested by marine species in seafloor habitats [29].